Issue link: https://read.uberflip.com/i/1423190
LoRa Alliance ® Whitepaper Page 21 of 49 LoRaWAN ® Gateways Radio Coexistence Issues and Solutions Copyright ©2021 LoRa Alliance, Inc. All rights reserved. www.lora-alliance.org Of course, the out-of-band emissions depend on the performance of the external cavity filter. The performance depends on the LTE band, the installation site, and the operator's choices. A typical performance of duplexer is presented here: Figure 21: Typical frequency response of external BS duplexer Typical attenuations can be obtained at the edge of the LTE bands: • 20dB@5MHz offset • 30dB@7.5MHz offset • 40dB@10MHz offset • 60dB@20MHz offset The following performance at the LTE BS antenna port can be achieved: Frequency Offset from UTRA DL Band Relative Level (spectrum mask) External Cavity Filter Attenuation Absolute Level for Wide-area BS (48dBm) Absolute Level for Medium-range BS (38dBm) 0MHz -55dB 0dB -27dBm/100KHz -37dBm/100KHz 2MHz -57dB 5dB -34dBm/100KHz -44dBm/100KHz 5MHz -65dB 20dB -57dBm/100KHz -67dBm/100KHz 7.5MHz -75dB 30dB -77dBm/100KHz -87dBm/100KHz 10MHz -80dB 40dB -92dBm/100KHz -102dBm/100KHz 20MHz -80dB 60dB -112dBm/100KHz -122dBm/100KHz To avoid desensitization, the noise generated in the LoRaWAN band must be lower than -124dBm/100KHz.